Republicans retaining at least one chamber stays near 75%

Name: Republicans retaining at least one chamber stays near 75%
Creator: ClearMarket
Published: 2026-10-30T00:00:00.000Z
License: https://creativecommons.org/licenses/by/4.0/

Kalshi 70%

record: CMSIG2026103004 | category: pre-event-pricing | target: CM-EVT-T5VXKJT451 | published: 2026-10-30

4-bullet brief | narrative

The Kalshi contract on Republicans controlling at least one chamber of Congress after the midterms sits at 70%.
Election-day is days away; the 70% reading reflects a market that favors GOP retention of at least one chamber but does not treat it as a near-certainty.
The companion Kalshi contract on the Democratic Party winning the U.S. House (CM-EVT-FV8MR86S63) sits at 94%, implying the market sees Democrats flipping the House as very likely while Republicans hold the Senate.
Resolves via the Bureau of Labor Statistics per the contract terms, an unusual resolution source for an electoral question; traders should note this potential ambiguity.

atomic briefs | structured for retrieval

[01] news_event

significance

surfaced in the daily Exa news-cycle scan; mechanically matched to an active kalshi market

story: The final weekend of the 2026 U.S. midterm campaign features Trump tele-rallies, a Democratic intraparty rift in Michigan, and major tech earnings all hitting markets simultaneously.exa_search → Thomson Reuters · as_of 2026-10-31T14:15:55+00:00
publisher: Thomson Reuters
published_at: 2026-10-30T00:00:00.000Z
source_url: https://wtvbam.com/2026/10/30/take-five-midterms-meet-earnings/

[02] pm_response

interp: Kalshi contract at 70%; the 94% Democratic House win contract on Kalshi implies the 70% GOP-holds-one-chamber reading is driven almost entirely by Senate retention odds.llm_judge_cm_signal_v1

evaluation

News-cycle wires publish on coverage, not editorial selection — the day’s top stories matched to the prediction markets pricing them, so nothing is cherry-picked.

judge_engine: none — deterministic news-cycle scan
judge_verdict: auto_published
judge_confidence: n/a — no judge gate (deterministic publishing)
prompt_template: news_cycle_v1 github · auditable
match_method: entity_slug_match (mechanical)

citation graph

Every wire traces back to the ClearMarket event it is built on, and out to each venue’s own market page — so any figure here can be verified at its source.

internal

cm_event: /events/kxbalancepowercombo-27feb/

external

venue_a: https://kalshi.com/markets/KXBALANCEPOWERCOMBO-27FEB-DD

programmatic access · four surfaces, same payload

AI grounded search reads embedded JSON-LD in HTML. Developers query REST. Agentic AI clients (Claude Desktop, Cursor) call MCP tools. AI crawlers index via /llms.txt. Same canonical record at every surface.

HTML	browsers, AI grounded search, crawlers (contains embedded JSON-LD `@type: Dataset`)	`https://clearmarket.fyi/signals/gop-holds-one-congress-chamber-after-midterms-kalshi-70-2026-10-30/`
JSON	REST API for developers	`https://clearmarket.fyi/signals/gop-holds-one-congress-chamber-after-midterms-kalshi-70-2026-10-30.json`
MCP	agentic AI tool call (Claude Desktop, Cursor, Continue)	`clearmarket.get_signal("gop-holds-one-congress-chamber-after-midterms-kalshi-70-2026-10-30")`
AGENT	AI crawler discovery index	`/llms.txt`

 PM data: platform APIs (hourly refresh). News context: retrieved with source citations. Editorial judgment: LLM judge with prompt template versioned per wire type. Per-claim provenance inline above; full per-field provenance map at the JSON endpoint under field_provenance.
  raw JSON record · same payload returned by REST endpoint
 {
  "$schema": "https://clearmarket.fyi/schema/signal/v1.json",
  "provenance_version": "0.2.0",
  "record_id": "CMSIG2026103004",
  "published_at": "2026-10-30T00:00:00.000Z",
  "detection": "news_cycle",
  "category_tag": "PRE_EVENT_PRICING",
  "secondary_tags": [],
  "pre_news_classification": "pre_news",
  "target_event_id": "CM-EVT-T5VXKJT451",
  "target_event_slug": "kxbalancepowercombo-27feb",
  "event_question": "Will Republicans control at least one chamber of Congress after the 2026 midterm elections?",
  "bullets": [
    "The Kalshi contract on Republicans controlling at least one chamber of Congress after the midterms sits at 70%.",
    "Election-day is days away; the 70% reading reflects a market that favors GOP retention of at least one chamber but does not treat it as a near-certainty.",
    "The companion Kalshi contract on the Democratic Party winning the U.S. House (CM-EVT-FV8MR86S63) sits at 94%, implying the market sees Democrats flipping the House as very likely while Republicans hold the Senate.",
    "Resolves via the Bureau of Labor Statistics per the contract terms, an unusual resolution source for an electoral question; traders should note this potential ambiguity."
  ],
  "atomic_claims": [
    {
      "type": "news_event",
      "field_provenance": {
        "story": {
          "tier": "mediated",
          "method": "exa_search",
          "source": "Thomson Reuters",
          "source_url": "https://wtvbam.com/2026/10/30/take-five-midterms-meet-earnings/",
          "retrieved_at": "2026-10-31T14:15:55+00:00"
        }
      },
      "significance": {
        "threshold": 5,
        "threshold_unit": "rank",
        "passed": true,
        "reason": "surfaced in the daily Exa news-cycle scan; mechanically matched to an active kalshi market"
      },
      "story": "The final weekend of the 2026 U.S. midterm campaign features Trump tele-rallies, a Democratic intraparty rift in Michigan, and major tech earnings all hitting markets simultaneously.",
      "publisher": "Thomson Reuters",
      "published_at": "2026-10-30T00:00:00.000Z",
      "source_url": "https://wtvbam.com/2026/10/30/take-five-midterms-meet-earnings/"
    },
    {
      "type": "pm_response",
      "field_provenance": {
        "notes": {
          "tier": "editorial",
          "method": "llm_judge_cm_signal_v1"
        }
      },
      "notes": "Kalshi contract at 70%; the 94% Democratic House win contract on Kalshi implies the 70% GOP-holds-one-chamber reading is driven almost entirely by Senate retention odds."
    }
  ],
  "evaluation": {
    "judge_engine": "none — deterministic news-cycle scan",
    "judge_verdict": "auto_published",
    "judge_confidence": null,
    "prompt_template": "news_cycle_v1"
  },
  "citations": {
    "internal": {
      "cm_event": "/events/kxbalancepowercombo-27feb/",
      "related": []
    },
    "external": {
      "venue_a": "https://kalshi.com/markets/KXBALANCEPOWERCOMBO-27FEB-DD",
      "venue_b": null,
      "benchmark": null
    }
  },
  "sources": [
    {
      "label": "Thomson Reuters: Take Five: Midterms meet earnings",
      "url": "https://wtvbam.com/2026/10/30/take-five-midterms-meet-earnings/",
      "published_at": "2026-10-30T00:00:00.000Z",
      "retrieved_at": "2026-10-31T14:15:55+00:00"
    }
  ],
  "field_provenance": {
    "pm_data": "kalshi_api",
    "news_context": "exa_search",
    "editorial_judgment": "cm_signal_llm_judge"
  }
}
 
   PROVENANCE PROTOCOL v0.2 · [direct] venue api · [mediated] grounded web fetch + source url · [derived] computed from listed inputs · [editorial] versioned llm judgment · full spec /schema/provenance/v1

record CMSIG2026103004 published 2026-10-30T00:00:00.000Z signature sha256-085d8db9330… ← underlying event all signals →